Should I do anything about this?

thats awesome! I'd love to have an animal spirit! We have a friendly ghost living in our house (this is where i grew up)-and he plays mild tricks and such but is definitly not out to harm anyone. They say having a positive spirit in teh house helps keep away negitive ones, so keep your "pet"! I have learned how ot deal with our ghost over time-if he is bothering me, i'll tell him and he usually stops (although maybe a dog ghost wont understand? Try a firm tone?) I knwo what you mean how its nice and scary at the same time, but i'd rather have him than something evil....